The electrocarboxylation of benzyl chloride with CO2 catalyzed by metalloporphyrins and the effects of different kinds of central metals and ligands on catalytic activities are reported. Metalloporphyrins whose central metal can form corresponding M (I) complex compounds such as CoTPP (Co tetraphenylporphyrine), FeTPP, possess higher activities of catalysis. Metalloporphyrins with water-sol. ligands such as (Co, Fe)TPPS, (Co, Fe)TTMAPPI are better catalysts. Electron-withdrawing groups on the rings of porphyrins cause the lowing of metalloporphyrins' catalytic activities.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, INFRARED SPECTROPHOTOMETRY, HIGH SPEED LIQUID CHROMATOGRAPHY, CARBON DIOXIDE, MASS SPECTROGRAPHY, COBALT COMPLEX, CHLOROMETHYLBENZENE, PORPHYRIN, CATALYTIC ACTIVITY